188397101 has 2 divisors, whose sum is σ = 188397102. Its totient is φ = 188397100.

The previous prime is 188397073. The next prime is 188397161. The reversal of 188397101 is 101793881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112254025 + 76143076 = 10595^2 + 8726^2 .

It is a cyclic number.

It is not a de Polignac number, because 188397101 - 2⁶ = 188397037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188397161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94198550 + 94198551.

It is an arithmetic number, because the mean of its divisors is an integer number (94198551).

Almost surely, 2^188397101 is an apocalyptic number.

It is an amenable number.

188397101 is a deficient number, since it is larger than the sum of its proper divisors (1).

188397101 is an equidigital number, since it uses as much as digits as its factorization.

188397101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 38.

The square root of 188397101 is about 13725.7823456443. The cubic root of 188397101 is about 573.2684909166.

The spelling of 188397101 in words is "one hundred eighty-eight million, three hundred ninety-seven thousand, one hundred one".